knock knock...who's there? wait...engine knock...

This is a discussion on knock knock...who's there? wait...engine knock... within the Internal Engine forums, part of the LSx Technical Help Section category; so after a 50 mile cruise this morning, i noticed while sitting in traffic that my oil pressure had dropped ...

knock knock...who's there? wait...engine knock...

so after a 50 mile cruise this morning, i noticed while sitting in traffic that my oil pressure had dropped and the car has a serious knock at low rpm.....i wasnt even mad cause i beat on this thing and its got some miles, so i knew it was bound to happen eventually. i checked my oil when i got home, and its lookin a litte wierd, and has some metallic flakes goin on.....im gonna change the oil and see what that does, and if its still the same, time for a transplant.

Spun bearing? How severe is the knock? A bent push rod would sound like a knock kinda, but wouldn't affect oil pressure. A stuck lifter might and would also sound like a ticking. Metal shavings to some degree are normal, but depending on how much you got out it's probably not a good sign.

Spun bearing? How severe is the knock? A bent push rod would sound like a knock kinda, but wouldn't affect oil pressure. A stuck lifter might and would also sound like a ticking. Metal shavings to some degree are normal, but depending on how much you got out it's probably not a good sign.

yea its comin from the bottom end.....i stuck a piece of garden hose to the oil pan and listened to the other end.....im thinkin my oil is really thin since i have that marvel mystery oil in there...im gonna change it and see what happens.

Anytime there is a knock and metal shavings........its almost always new motor or rebuild time. Sucks but if you were expecting it then it lessens the blow.

PS: I've never seen any metal in my oil, only time I seen any amount of metal was when I blew my 82 Trans Am 305 up

EDIT: What I'm saying is, anytime you can visually see metal on the oil dipstick, kiss the motor goodbye within a short amount of time. I would still change the oil and see what it does. Not going to hurt anything

yea the ol lady is bummed, so i had to front and tell her that it may be an easy fix.....but i assume the worst, so if i have to, ill purchase a longblock from cratenginedepot for $2600....sneak a cam and stall in there before i stick it back in...sucks cause we were just discussing a new paint job for this summer.

yea the ol lady is bummed, so i had to front and tell her that it may be an easy fix.....but i assume the worst, so if i have to, ill purchase a longblock from cratenginedepot for $2600....sneak a cam and stall in there before i stick it back in...sucks cause we were just discussing a new paint job for this summer.

i wont mess with it for a few days probably....i had 1 quart of mmo, and the rest castrol gtx 10w30.......i started it up about an hour ago to put it in the garage, and the knock wasnt there...which leads me to believe my oil has thinned and needs to be changed since the engine was cooled ....

i wont mess with it for a few days probably....i had 1 quart of mmo, and the rest castrol gtx 10w30.......i started it up about an hour ago to put it in the garage, and the knock wasnt there...which leads me to believe my oil has thinned and needs to be changed since the engine was cooled ....

If you had NO metal on the dipstick I'd say you were fine and maybe a "Piston Slap" issue happened from thinned oil but I'm not holding my breath!

I hope I'm as wrong as two boys in the woods fucking because I don't like to see a buddy have to spend money

If you had NO metal on the dipstick I'd say you were fine and maybe a "Piston Slap" issue happened from thinned oil but I'm not holding my breath!

I hope I'm as wrong as two boys in the woods fucking because I don't like to see a buddy have to spend money

i usually have piston slap until it warms up.....its a different sound than what i heard yesterday.....but this was at operating temp and it started while i was sitting at a red light...but like i said, it cooled down and i started it back up and it wasnt there...so im crossin my fingers....and actually, part of me hopes that its knockin because i would really like a new engine......just have to justify it with the boss...

Ya man I hate to hear that too but metal on the dipstick is never good... On the bright side though an ls6 longblock is around 3500 shipped and you'd be looking at around 400whp with bolt ons and the m6.

Ya man I hate to hear that too but metal on the dipstick is never good... On the bright side though an ls6 longblock is around 3500 shipped and you'd be looking at around 400whp with bolt ons and the m6.

Ya man I hate to hear that too but metal on the dipstick is never good... On the bright side though an ls6 longblock is around 3500 shipped and you'd be looking at around 400whp with bolt ons and the m6.

mines about shot. i sounded like a tug boat pulling into the parking lot today so im pribably ordering my ls6 block tonight

Ya man for the money over an ls1 its well worth it, with an a4 I'd bet around 380 with full bolt ons and a good tune.

Originally Posted by BashamWS6

mines about shot. i sounded like a tug boat pulling into the parking lot today so im pribably ordering my ls6 block tonight

Ouch man so are you order it from scoggin dickey tonight? My shortblock is almost done it should be going in my car next month, I've got all the little pieces like bolts, gaskets etc to put it together I just need a good set of 243 heads for it lol